Microprocessor controlled, single beam, scanning UV/Vis spectrophotometer.
- Range 190 to 1100nm
- Operating modes: Basic (A, %T and C), Quantitative, wavelength scan, Kinetics, DNA/Protein, multi-wavelength, custom
- Bandpass 4nm
- Adjustable scan speeds and intervals
- ¼ VGA backlit graphics LCD
- Centronics printer output and bi-directional RS232 port
- GLP self-calibration routines
- Automatic blanking at the measurement wavelength
- Non-volatile memory stores up to 50 methods/results
Quantitative Mode
Up to 10 standard solutions may be used for a calibration, 3 types of correction methods available: single wavelength, iso-absorbance or 3-point. Choice of 4 methods for curve fitting: Linear fit, linear fit through zero, square fit, cubic fit.
Kinetics Mode
For course scanning or reaction rate calculations. Absorption v time graphs displayed in real-time. Wait and measurement times up to 8.3 hours can be entered with intervals of 0.5, 1, 2, 5, 10, 30 secs and 1 minute.
DNA/Protein Mode
Concentration and DNA purity are calculated: Abs ratios 260/280nm or 260/230nm with optional subtracted absorbance at 320nm. Alternative wavelengths/factors may be entered.
Multi-wavelength Mode
Up to 10 wavelengths may be entered, allowing measurement of multiple wavelengths on a series of samples.
Supplied with manual cell changer for 4 x 10mm square cuvettes, 4 x glass 10mm cuvettes, 2 x 10mm silica cuvettes, mains lead, dust cover and user manual. For 115V, 230V 50/60Hz single phase supplies.
| Model | M501 | |
| Wavelength | range, nm | 190 to 1100 |
| accuracy, nm | ±1 | |
| resolution, nm | 0.1 | |
| repeatability, nm | ±0.05 | |
| Zero drift | A | <0.003 per hour after warm up |
| Baseline flatness | A | ±0.002 |
| Bandpass | nm | 4 |
| Photometric accuracy | Better than 1% at 0.5A, 1A, 2A | |
| Photometric range | -0.7 to 3A, 0 to 200%T, 0 to 9999 Conc. | |
| Unit selection | mg/l, mg/ml, g/l, ppb, ppm, %, I.U., mM/l, M/l, custom via keypad | |
| Scanning speed | 75 to 2000nm/min. in 3 levels (high, medium and low) | |
| Scanning interval increments | nm | 0.1, 0.2, 0.5, 1, 2, 5 |
| Ouputs | Centronics printer, bi-directional RS232 | |
| Cell centre height | mm | 15 |
| Light source | Tungsten-halogen and deuterium | |
| Dimensions H x W x D | mm | 270 x 550 x 420 |
| Weight | kg | 18 |